Tread portion of an automobile tire



FIG. 1 is a perspective view of the top, front and left side of a tread portion of automobile tire showing my new design;

FIG. 2 is a front elevational view thereof, the top and bottom plan views being identical thereto;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is an enlarged fragmentary front elevational view thereof; and,

FIG. 7 is an enlarged cross-sectional view thereof taken along the line 7—7 in FIG. 6.

The elements shown in phantom lines are for illustrative purposes only and do not form any part of the claimed design. 

The ornamental design for a tread portion of an automobile tire, as shown and described. 